<md-toolbar color="primary">
  <span class="fill-remaining-space"></span>
  <span> <md-icon svgIcon="warning"></md-icon> </span>
  <span class="fill-remaining-space"></span>
  <md-toolbar-row>
    <span class="fill-remaining-space"></span>
    <span> &copy; 企业协作平台 2017-2020 学习angular4 </span>
    <span class="fill-remaining-space"></span>
  </md-toolbar-row>
</md-toolbar>